Key result
Orthostatic stress via 60-degree head-up tilt decreased internal carotid artery blood flow by 9.4% (P<0.01) compared to supine, while vertebral artery blood flow remained unchanged.
Why the study?
Does orthostatic stress evoke regional differences in cerebral blood flow in the internal carotid and vertebral arteries in healthy young men?
Population
6 healthy young men
Comparison
Orthostatic stress and acute hypotension induced… vs Supine condition
Design
Other
Authors
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Suggests regional cerebral autoregulation differences during orthostasis; leaves open relevance to clinical populations.
Cross-Sectional (n=6)
Does orthostatic stress evoke regional differences in cerebral blood flow in the internal carotid and vertebral arteries in healthy young men?
Effect estimate: -9.4 ± 1.7%
p-value: p=<0.01
Orthostatic stress evokes regional differences in cerebral blood flow and dynamic cerebral autoregulation between the internal carotid and vertebral arteries.
Sato et al. (2012) conducted a cross-sectional in Healthy (n=6). Orthostatic stress (60 deg head-up tilt) vs. Supine position was evaluated on Internal carotid artery (ICA) blood flow (-9.4 ± 1.7%, p=<0.01). Orthostatic stress via 60-degree head-up tilt decreased internal carotid artery blood flow by 9.4% (P<0.01) compared to supine, while vertebral artery blood flow remained unchanged.
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